array map

last-endcode · last-endcode · commit 0cbc16ee3176 · 2020-10-15T13:53:27.000+07:00
diff --git a/36_array_map.js b/36_array_map.js
@@ -0,0 +1,32 @@
+// return new array
+//not change size of original array
+//uses values from original array when making new one
+
+const people = [
+  { name: 'bobo', born: 1987, position: 'developer' },
+  { name: 'peter', born: 1989, position: 'designer' },
+  { name: 'sussy', born: 1975, position: 'the boss' },
+  { name: 'Jane', born: 1999, position: 'the boss' },
+];
+
+// const born = people.map(function () {});
+// console.log(ages);
+/*output: 
+[ undefined, undefined, undefined ]
+*/
+
+const borns = people.map(function (item) {
+  return `The member company is ${item.person} as ${item.position}`;
+});
+console.log(borns);
+
+// example again use return as objects
+const names = people.map(function (item) {
+  //create obj firstName and age
+  return {
+    firstName: item.name,
+    age: 2020 - item.born,
+  };
+});
+
+console.log(names);
